The origin of the Hungarian name
Dénes
has the following meaning:
Follower of dionysos.
The etymology of "Dénes"
is 
Hungarian form of Dennis.
This meaning also applies to these versions: Denes
Other information:
 
 
Etymology is the study of the origin of words, and in this case, the origin of names. 
The word etymology comes from Greek 
etymon, "true sense of a word", and logia, "doctrine or study".